my Tesla Model S Plaid/Refresh (2021-present) has a burning smell when I accelerate

Tesla Model S Plaid/Refresh (2021-present)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

3 min read

489 words

⚠️ Safety Warning

This issue requires immediate attention. If you are not experienced with automotive repairs, consult a professional mechanic. Working on critical systems can be dangerous.

Problem Statement

Learn how to diagnose and fix the burning smell during acceleration in Tesla Model S Plaid. Step-by-step guide with diagnostic procedures and repair instructions.

Affected Component

Electrical

Estimated Time

2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the high-voltage battery before working on electrical systems.
•Allow components to cool before inspection to avoid burns.

Symptoms

•Burning smell during acceleration
•Possible decrease in acceleration performance
•Overheating warning on the display
•Unusual noises from the electric motor or drivetrain
•Battery temperature warning

Diagnostic Steps

1
Inspect the battery pack for any visible signs of damage or leaks.
2
Check for any error codes using a Tesla service tool or OBD-II scanner.
3
Examine the electric motor and associated wiring for overheating or burns.
4
Inspect the brake system, including pads and rotors, for signs of excessive wear or glazing.
5
Monitor battery temperature and performance metrics through the vehicle's diagnostics interface.
6
Look for any signs of fluid leaks beneath the vehicle.

Solution

💡 Expert Tip

For complex repairs like this, consider taking photos at each step. This helps if you need to reverse a step or consult with a mechanic. Also, keep all removed parts organized - you may need to reference them during reassembly.

Verification

After completing the repair, verify that the issue has been resolved:

✓Test the affected component to ensure it functions correctly
✓Check for any error codes or warning lights
✓Monitor the vehicle for a few days to ensure the issue does not recur

Prevention Tips

To prevent this issue from occurring again:

•Follow the manufacturer's recommended maintenance schedule
•Address warning signs early before they develop into major issues
•Use quality parts and fluids recommended for your vehicle
•Keep detailed records of all repairs and maintenance

Tools & Equipment Required

•Multimeter
•Socket set
•Torque wrench
•OBD-II scanner or Tesla service tool

Parts Required

•Replacement brake pads
•Replacement wiring

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Diagnostic Steps

1
Inspect the battery pack for any visible signs of damage or leaks.
2
Check for any error codes using a Tesla service tool or OBD-II scanner.
3
Examine the electric motor and associated wiring for overheating or burns.
4
Inspect the brake system, including pads and rotors, for signs of excessive wear or glazing.
5
Monitor battery temperature and performance metrics through the vehicle's diagnostics interface.
6
Look for any signs of fluid leaks beneath the vehicle.

Solution

1. Preparation

Ensure the vehicle is parked on a flat surface and turned off.
Disconnect the high-voltage battery if recommended in the service manual.
Gather required tools and parts.

2. Inspect Battery Pack

Remove any protective covers or panels from the battery pack.
Check for any signs of damage, including burnt connections or fluid leaks.
If damage is found, consult with Tesla service for battery replacement or repair.

3. Check Electric Motor and Wiring

Visually inspect the electric motor and wiring harness for signs of overheating or damage.
Use a multimeter to check for continuity in the wiring and connections.
If any damaged wires are found, replace them with OEM parts.

4. Inspect Brake System

Remove the wheel to access the brake components.
Check brake pads for glazing or excessive wear; replace if necessary.
Inspect brake rotors for warping or overheating; replace if warped.

5. Reassemble and Test

Reinstall any covers or panels removed during inspection.
Reconnect the high-voltage battery, ensuring all connections are secure.
Perform a system check to ensure all components are functioning properly.